Most Samsung Galaxy devices feature a hidden, built-in hardware diagnostics menu that allows users to test and reset sensor matrices without downloading third-party software. Step-by-Step Access Instructions Open the native app on your Samsung device. Type code *#0*# into the keypad.
There are two primary forms of this tool:
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Reboot the phone. Go to Settings > Biometrics and Security > Fingerprints . You should now be able to register a fingerprint normally. The "Add fingerprint" option must return.
If your lock screen continuously prompts you with calibration-related warning messages. Official vs. Unofficial Calibration Methods Most Samsung Galaxy devices feature a hidden, built-in
Connect your Galaxy phone to the PC using an official USB-C data cable.
Fingerprint Sensor Calibration After Android Screen Replacement There are two primary forms of this tool:
You may have seen YouTube videos claiming you can calibrate the fingerprint sensor using a , a silicone gel pad , or even a gummy bear . Do these work?
This is the most common trigger. If you or a technician replace the OLED panel, the new glass thickness and sensor positioning will not match the old calibration data.
Samsung provides an official calibration workflow through its global Self-Repair Program (partnered with iFixit in several regions) and through authorized service centers.